baker



April 23, 1929. R. D. BAKER WORK HOLDING DEVICE Otiginal Filed April 6.1922 2 Sheets-Sheet N6 wk P/ Mord fi Ba/rer Af/ar-rs-eys April 23, 1929.R. D. BAKER WORK HOLDING DEVICE Original Filed April 6. 1922 2Sheets-Sheet tion broken away;

Figure 2 an elevation, partly in sectionon line 2 of Fig. 1, showingggthe device mountedon a maehineieed table through slots 22,c

' table and terminating in a projeetin Figure 3 anelevation in sectionon line 3 of Fig. 1, showing; the details of the-psitioning plunger; and

Fi'gures iand 5 are p-lanviews showing the relative positions of thetool, 'feed 'table and work holding device durlng operation of themachine through a single cycle of its for ward travel. 7

Referring tothe drawings the device is shown with its has-e10 resting onthe work table or bed 12 of a. machine tool s1 milling machine. It isassumedherein that this :bed is machine-fed, although obviously it Inayalso be fed by hand. which for par and it is described it will he poseshereof would be eqiiiivalent; assumed that the apparatus to be 1s anattachment thereto although obvious that it might bebuilt as a "eggular'part thereof, not detachable without depart-'- ingirom the scope of theinvention. The base 10 may be constructed in any desired length to litthe particular-bed o'f'the niachineon which it is to be used, itbeingadvantageous to proportion the base so that its extremities may bebolted close to the ends of the machine bed" Attachment may be made withconventional T-bolts using a notch 14 of the fixture and a T-slot16 oithe machine table. cured to the upper side of the liyture, base by meals of b' g screws 20 passing in the rack I glee to the table travel, thusmaking the flack adjustable transversely of the base; On the latter areturn travel table/24; is mounted so as who slidable longitudinallythereon with'provis'ion for clamping it rigidly thereto when desired aswill. hereinafterappeal. This return travel table may be moved along thebase by turning a hand crank on the squared end 26 of the shaft 28which, through a train of gearing, rotates a gear 48 iii-mesh w th therack 18. As. illustrated, the train consists of bevel gear 30 fixed onthe shaft 28 and in mesh with another bevel 32 en.

gaged with a similar gear 34; fast on a hori zontal shaft 36 iournaledin the return travel a por-- tion on which is secured bevel 38 whichmeshes withtheb'evel pinion 410 attached to the verticalsha'ft 42,journaled in abeaxing of a projecting-arm 44. of the travel table. Onthelower extending portion 4-6 of this shaft 4:2 is 'gear 48, whichprelferably is desc 'ibedv scribed to effect p An extended racl: 18 isso blocks is .stud52 reschangeable, so that gears of differing diam-'eters may be employed; for meshing witl which the rack 18' is adjust )leas reviously it is manifest rai; through the 1 and by turning the traveltable may be HIOVQCl to a base section in either direc i the travel oithclatter, which iast to and. moves with the machine bed. Means otherthan "he hand crank and sha i are also provided for actuating the tr Iar-mg 111 de ned movement 1: I, .iil oi tie travel tacit, v. scribednore par-ti" litestniig on the r turii tal lo adapts tical stud 52..Thzs tion extending upwo tial hearing at tel" th which hub extend ribsin "/1 slice i.

5G and 58 to which wor ohi clamps may. be secured @thcr 1-. c ofholding: work onthe table he provided as desired, 'ihe tu' twohorizental surfaces Gdano G i the asne'ct of arms, enter in op iiactions from the hub upon which the word may be pla ed. For clearness inthe drawings, the specific slots holes rid or clamps the may be on thesearms t1 engaging; the work are omitted and the arm itso l typifies thework holder. These .1 Cu es olf'these aria portions of the "pa under theupper jaw es a clamp whose under jaw has a beveled i'ace adapted cen-gage a complementary beveled n de ezlaje of the fixture base 0. looselypositio secured to the lugs not ih L support- '52 'r ugh the ical facesreturn 1 cut. yfasten".

i p oi rather sl r'projectlng end of clan'ipingg handle 76. 3 the-hairlrs' tends to v i flier, caus= K, 4 w. v i1 9. the irooerone to ta leupon the travel le and t he other'blocl; ip tightly against the inclineoor se. t is cut that the f thew rlr holdin turn taole can l lly securedbykr short tl row of the handle 16'. v

- e I tl e turn table may 1 he base 10, in the hey turn rests upon thebase,

head of the center iection of the-turn terminates in :ig-iiust :isheuhlel' 82 of [he fixture base. lui.'ning the handle 80 in the properdireclien, draws the stud (lawn ful'ltlllg' the lei-n lsihle upon thetravel Cable Zlllil lhe lull'ei' upon the been (Fl-real; .i'igiility ofthe device is lh ii: secured by elzuiipii'igg the llllll while,li'sii'el (able mill llll-SC hie-l1 logethe' at Front Zli'lfl lJZLtfiCejf lhe hie-Le. As ifegurtils the urn 'lelale these lamps are (m lmtheiiles oi the iinee where the cell; being nmehinea'l is hehl.

i'Vilh l'h a ehii'iigie lees-cued the tum tniile iiiiiy lie i'welveilnheul the eliiil $32 into any :iiiiguhu' [)(fi-llllil'l hi l .1 .bi'Othe o'i'ilimiiy leczitien of (he i 1 when the Work is; he-- with eitherthe mini 6i) eiin -1' i'iieehiiieih is the arm 61 extending;trimsiwerely a mess the (lii'eclieu 0i li fiielllel'li" of the Gravell'nh e there is provhled means whei'ehy the li n liable may he led l ineither- 01'. 'uhese YObPOC- live positions. Til -3H means eeiliprise 2Lplunger 98 (Fig. 3) Slllllllll) within ii chain-- her of the travellzehle ll, ink) 01 out of en g egeinenlx Willi seelie l's 1 )0 or 101 solocated ii pen the under side (if the mien hihle, ithril; when theplunger lilt-*l)i'i 0i (me (iii .heni 2m, aim of lhe lei-i1 elm will heCLCIIX-lb ihe fi'z'vel l'fllJlQ at 1" ght an 0:5 '60 its line oflZI'LVQl. The positioning i'ili'iiigg'eir 98 is held in either seclcetby 1 Spring: 10: eeiriieumiiiie; i1 reduced po l ien 10% Sf lhe phm erand sealing; against ill) lJOllOl'il 0f 'lhe ehiu'iiher in the travellahl This reduced pert-inn lP-il: extends ll'llm! 51h e. 71 the bol''mn11ml ceii'iiecte 'w'l h 51 level i053 ffUlCUiHBO-(l on a 'iinjee on 5.08of the lmvel l able. Depression etl li-h lever \Vil lM'h'MJ the'})ll1i'] $1(il fi'em the ijfiiflifii] iii lihe turn l'zilile and allowsthe liiliei' to he related.

The relation ellhe tin-i1 table, hev-re i'i'l iiizerl lo eieelmeveiiienl' of he! h il'tl, the i1 avol table iilengj the hem of ihe deil 'i'elzli'iezi to iihe 'l'ievel lulile Where A relation of the turntable the gem 4:8 cause in mll along; lhe rrclz l8.

With in IL re ves the turn table, en il lei- 'l'm'e at Lhe eei'l e alie-l1 c, ll 1 having}; (l'ieliiliii: I ahem; its 'pei'i; ih'ziiity ofeoelcele 86, into any oil may he sealed :1 spring l :il" piiiriihgr i1(li the tin-i1 tehie, will a handle fie the (,[lfPjQ l'hei'eef. Th

'Ul'iLlLlUll oi. lzhie gem elleele longitudinal 1 ixiiweiiieriln (if he"revel mhle :iiizl with it he 1 v the heme. Upon me DIK 111 "mile 25 is:*Ihur; ilill under {N V1.11 ope uhle he?! means (in hell] lllllt; e1?lhe tin-n (able :30 1-11 :u'iaie mtieueeeiv zu'e leerileil i p phi1;,101' h precision so v base 10 with lhe Well;

i 'reveJ ill of lhe new work eat. lHli ei iiuli hau lie uefieifihw 2upon thebasosection in a direction opposite I. J r urn oi with the rack18 which is fixed on the'b'ase,

rolls backward'on that rack, carrying with it the return travel tableand the turn table. The return travel table in so moving slides to thetravel of the machine bed. The latter may be assumed to be movingtor-Ward at the customary slow pace; and it may be further assnn'ied,for the jiarticular m thod of operation t; describcd, that its motioncontinue-a while we turn table is being rotated backward. The rotationofthe latter is arapid matter, executed by hand, and may beenecuted sorapidly that meanwhile the continuously feeding; machine table willtravel but a short distance.

e la considered dangerous,the operation of the l of the machine bedmaybe stopped durthe return ol the re urn travel table and ,ed againwhen that has been completed,

at which time ti e positioning of the new work has become automaticallycorrect for opera-- i ng tool.

beevidcnt that the trograde movement oft-he device inust'be (,4 'erent,an d this is ar ged for by inixrchangeable travel 48 so that 1 ars ofvarious diameters may be used,

the rack being adjustable to'and from the axis car 48 asalreadydescribed to accommodate gears of diiierent diameter. When theturn table has been revolved until the seat which was not engaged hasreached the positI L the latter springs into the sea ireventing furtherrotation.

ndles then are tightened an d the new workfeeds alone; the tool. Whilell no; the tool, the operabr removes 1c finished work :Eron'i that armOfi' the turn table which hash-eon revolved into conveniently accessibleposition, and inserts new,

thus completin the cycle of operations. This cycle may be repeateduntilthe travel table may be near the other end of the machine liediron'i that'at which it started. chine bed is then returned to itsoriginal po sition in the usual way; and the travel table i is movedhackto that end or the machine bed where it originally was, to wit, itsforward end. To do this latter, the clamping handles the holding" deviceare released, and the ate lochi The oistancewhich the return traveltable must be arranged to so during the hall: revolution dolor difierent sizes or The ma-' olt 88 withdrmvn, thus freethe plane from theturn table so as to permit the former and its bevel gear 32 to be turnedby a hand crank (to beplaced on the shaft 28) without rotating theturntable. 'Jhe travel table carrying; the turn table, having; beenmoved along to one end of the base of the fixture by the crank andgearingfthe locking bolt is returned to whatever seat 111 the white ismost convenient the clam Jill l v a:

handles aretightened, and the device is ready again for operation. i

A large partof machine work 15 onsmall pleces, tor which a shorttravelof the machine bed or table is sufficient. Regardless ot tho length oftravel required for the work up to, the limit a machine will take, thedevice enablesa machine bed to move its full length without stopping.During this movement the work holders and their support have a step i by step backward travel along the base of the device and hence along the.machine bed, winch is also the lieeding bed. During the intervalsbetween these bacl'rward ste s from a departing position on one side ofthe tool to a position of approach on the other side of thetool,theworkholders are carried forward with l t bed, thusrecovering thedistance travcr id luringthe lr-zmkward steps iii the step backwardoccurs while the machine bed is moving continuously forward, thetravelof the bed which occurs during this backward step, i. e. while theturn table is being revolved, is not util zed. This loss is not great,and even this may be avoidedby stopping the bed when the work has passedthe tool, and holding 1t still while the step backward of the workholders along the bed is eii ected. There is a further large saving dueto that feature oi the invention by which new work 5 takes the place ofold on the turn table, while the tool is at work; and by which theworknewly set comes-automatically to a proper position with small clearancefrom the tool.

.I claim as my invention 1. The combination, in a machine tool hav- 'inga fined cutter and a work bed having a relatively long feeding travel,of a support :mounted on the bed selectively to slide along a lineparallel with the travel of the bed or to be fixed thereto; a tablepivotally mounted on the support and having wor holders "spacedaroundits pivotal axis; a rack on the bed 5 a gear fixed to rotate with thetable; and means on the support connecting the gear and rack wherebyrotation of the tablemoves said support and table along the bed inadircction Opposite to the feed oi the bed and movesone of saidworkholders out of and another of said work holders into the path of thetool.

2. A work holdingqiircture for a machine toolhaving a work-feeding bed,comprising a base adapted to be secured rigidly on. the work bed oi themachine; a support '1GC1plO-- cable on said base inthe direction or thefeed of the bed and adapted mternnttently to be held, rigid on the base;a table rotatable on its the si'lpport and adapted to hold Work at 2Lplurality of locations around its axis; and gezui 11g between the tableand the base Whereby e rotation of the tahle and a retrogression on tl-1" Erase ocean r me work holders thereby moving into the path of feedof the bed to the too -U The eou'ihhmtion in e umchine having); a toolfixed in operating pos on end a Work bed with relatively long feedmo;trzwel of :1,

support mounted movubly on the bed, with means to lock it rigidlythereon for movement with the bed in feeding direct-i 1. and means tomove it in the opposite direction on the bed when. unlocked; a tablerot' bly mounted on the suoport and adopted to hold work at a ph'u-alltyof locations around the axis; and, connect means 'wl'ierehy e rote--tilon of the table and a retrogression of the support occur shnulteneusly, Wherehy Work location Which has heen est the tool I feed *2 rearof the tool, simultea'icously 1 the TL volving of another WOIflS'Llocation int the mid path before the tool.

l. The cori'ihinz'ition in it machine tool hztring it fixed cutte and aWork lied and e relatively long feeding travel, of a sup 'iort mountedon the lied selectively to slide along: a. path parallel with the travelof the hed or the path of the tool.

o. The cou'ihihat o: v a machine tool hovreczproczrhle work ing it fixedcut ly lone; feeding travel, oit u bed with relzrtlv reciprocahlesupport moum' d on the hed. selectively to slide elo a line parallelwith. the travel or, the bod-o1 to he lived thereto; at tzthle pivomlly.u'iounted on the support and having work holders spzwed uround itspivotal axis; gearing hetween the table and the bed whereby it rotationot the tojliile and at rotrogress-xiou of the support on the bed occurtogether with one out the work holders thereby moving into the path oithe tool; and one disconnecting said ring so that a. IQlklOQlQSSlOH ofthe hed and relative rosion of the support hmy occur witl'lout roo?Apr-i l, i

Elf/HARD l) BAKED-t.

